1. Division of Cardiac Surgery IRCCS Azienda Ospedaliero‐Universitaria di Bologna, S. Orsola Hospital Bologna Italy
2. Department of Advanced Biomedical Sciences, Division of Cardiac Surgery University of Naples “Federico II” Naples Italy
3. Division of Pathology IRCCS Azienda Ospedaliero‐Universitaria di Bologna, S. Orsola Hospital Bologna Italy